Waterproof crown for watches.



M. 1. GOLDEN.

WATERPROOF cRowN FOR WATCHES.` APPLICATION FILED NOVI'T, 1917.

1,295,028. Patented Feb. 18, i919.

-f/ M16-2mm.

A TTOHNEYS 3.6 claims appended hereto.

UNrrED srArEs nommen. J; GOLDEN, or BROOKLYN, NEW Yoan WATERPROOF ,CROWN FOR WATCHES.

Specification of Letters Patent.

Patented Feb. 1.8 1919.

Application led vNovember 17, 1917. Serial No. 202,552.

To all 'whom t may concern: I

Be it known that I, MORTIMER J .f GonDEN, a citizen of the United States, and a resldent of the city of New York,.borough of Brooklyn, in the county of Kings and State/of New York, have invented a new and v .Improved Waterproof Crown for Watches, of 'which the following is a full, clear, and exact description.

This invention relates to waterproof watches and has to deal more particularly with improved means for preventing the entrance of moisture into the watch case at the ,winding and setting stem.

The invention has for itsgeneral o bjects to improve the construction and operatlon of devices of this Acharacter so as to be reliable and eiiicient in use, com aratively slmple and inexpensive to manu acture, and so designed that the windingV and setting of the watch can be easily and quickly effected and waterproofness positively insured.

A more specific object of the invention is 'the provision of'a simple and novel crown and clamping and unclamping means therefor to normally hold the crown seated inwater-tight conditlon, and to permlt the` crown to be released when the ,watch is to be'wound or set. y

With such objects'in" view, and others which will appear as the description proceeds, the invention comprises various novel features of construction and arrangement of parts which will be set forth with particularity in the following description and The resent invention is designed as a modie form ofthe invention forming the subject matter of an application iiled by me October 6,1917, serial No. 195,007.

In the accompanying drawing, which illustrates one embodiment of themvention and wherein similar characters of reference indicate corresponding parts in all the views.

Figure 1 is a fragmentary view of aNVatch, showlng the improved crown and the clampingF means therefor;

ig. 2 is an enlarged sectional view von the lme 2-2, Fig. 1;

Fig. 3 is a similar view showing the clamping cap or-ring in unclampin position to permit thecrown to be opera for winding or setting the match.;

Fig. 4; is a sectional view on the line 4 4,

Fig. 2;

Fig. 5 is a perspective view of the hub or seating section of the crown.

Referring to the drawing, 1 designates a watch case which' has a pendant 2 suitably fastened thereto and passing through the pendant is a tube `3that accommodates the winding and setting stem 4, and inthe tube is a clutch 5 that vcooperates with the oppositely coned portion 6 of the stem to hold the stem in winding and setting relation, as

shown by the full-and dottedl lines, Fig. 3. Attached to the stem is .the crown 7 for manipulating the stem.

' The crown 7 is made up of a head 8 having a threaded opening 9 and a countersink 10, and into .this openingscrews the reduced threaded portion 11 of the hub or seatingl of suitable material to constitute a packing,

there being annular grooves 21 in the seating surfaces 17 and 18 into .which the'packing is pressed to produce better` joints to eX- clude moisture. The packing may be saturated with oil to improve its waterproofness.

The crown is normally clamped, as shown `in Fig.y 2, by means of a clamping ring or cap 22 which has a left-hand thread to engage the threaded circumference 23 of the pendant. The ring has internal lianges 24: and 25, the former of which normally engages the externalv shoulder 16 of the crown to draw the latter into the pendant and compress the packing. The other iange 25 is adapted to engage an external shoulder 26 on the Ypendant when the clamping ring is unscrewed, as shown in Fig. 3. In assemblingv the parts the flange 25 is cylindrical so that the clamping ring can be screwed onto the pendant, and then by a suitable tool the flange is turned in to the position shown, whereby the clamping ring is permanently fastened to the pendant and cannot be removed.

In winding the watch it is first necessary to turnthe clamping ring so as to unscrew it from the position shown in Fig. 2, to that shown in Fig. 3. This frees the flange 24 from the shoulder 16, so that the crown can now be turned to wind the watch spring. This unscrewing of the clamping ring also provides clea-rance between the flange 24 and shoulder 16 to permit the crown to be lpulled outwardly to the dotted-line position, Fig. 3, to thereby enable the watch hands to be set by turning the crown.

After the head 8 of the crown is screwed to the central section 12, the attachment is the countersink 10.

From the foregoing description taken in connection with the accompanying drawing, the advantages of the construction and method of operation will be readily understood by those skilled in the art to which the invention appertains, and while I have described the principle of operation, to-

gether with the device which I now consider to be the bestembodiment thereof, I desire to have it understood that thedevice shown is merely illustrative and that such changes may be made when desired as fall wit-hin the scope of the appended claims.

It is to be understood that the present application relates specifically to a construction involving a cap 22 formed with the flanges 24, 25 engageable respectively with the shoulder on the hub of the crown and the shoulder on the pendant; I do not claim in the present application the generic features whereby. a water-tight joint is formed at the exterior of the pendant, 'distant from the outer end thereof, by means of the relatively turnable cap orI like instrumentality, the

generic .features common to the two applications being claimed 1n my prior application above named.

Having thus described my invention, I'

claim as new and desire to secure by Letters Patent:

1. The combination of a watch case, a pendant connected therewith and havingan external thread and having a reduced portion lying between the thread and the case, whereby an annular external shoulder is formed, there being a recess in the outer face of the pendant, a packing in the said recess, a crown hai/'ing a hub of such diameter as to enter the recess to engage the packing, and said hub being circumferentially reduced to form an annular shoulder, and a clamping ring threaded on the pendant and having internal flanges spaced apart a distance greater than that between the shoulders of the pendant and hub, whereby lone flange engages the pendant shoulder to limit the unscrewing of the clamping vring in a direction to free the crown for axial and rotative movement and the other flange being adapted to engage the shoulder of the hub when the clamping ring is screwed tight for producing a water-tight joint between the crown and pendant.

2. The combination of a watch case a pendant thereon having an external thread and reduced in diameter at a point between the thread and the case, whereby an annular external shoulder is formed, a crown having a hub reduced at an intermediate portion to form an annular external shoulder, a packing between the hub and pendant, and a clamping ring threaded `on the pendant and having internal annular flanges spaced apart a greater distance than that between the shoulders of the pendant and hub, whereby the turning of the ring in one direction clamps the pendant and crown together in water-tight relationand turning in the opposite direction unclamps the Crown While the ring maintains a threaded engagement with the pendant.

MORTIMER J. GOLDEN. 

